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Rind (Abandoned)

Rind is a templating engine that turns HTML (and XML) into node trees and allows you to create custom tags or reuse someone else's genius. Rind gives web devs tags to work with and provides the same thing to app devs as an object. This project is just getting started so watch out for sharp corners and unfinished rooms. Enough of that, let's talk about what's done.


gem install rind

Come say “Hello”.

# example.rb
require 'rubygems'
require 'rind'

# Create a new document and load your template.
doc ='index.html')

# Xpath search for the the title and add some text.
doc.xsf('/html/head/title').children.push('Hello World')

# Send it out the door.
puts doc.render!

Create your own!

One of the great things about Rind is that you can create your own HTML elements and bundle them in modules. Imagine making a module that performs a variety of useful functions on images. For example, it could provide a gallery view that automatically generates thumbnails and paginates. Clicked pics could provide full sized versions of themselves in a lightbox.

Create your custom module.

# images.rb
require 'rind'

module Images
  class Gallery < Rind::Element
    attr_accessor :path_to_images

    # gallery magic here

App devs treat it like an object.

# index.cgi
require 'rind'
require 'images'

doc ='index.html')
doc.xsf('/html/body/images:gallery').path_to_images = '/home/me/photos'
puts doc.render!

Web devs treat it like a tag.

# index.html
    <images:gallery width="400px" per_row="5" max_rows="3"/>

And just like a regular Ruby module, if you make it available, we can all benefit.

Mucking with standard HTML

Interested in modifying the behavior of a standard HTML element? Let's say that you want all external links to use rel="nofollow". Rather than remembering to do this every time you can build it into a base namespace.

Create your base module.

# core.rb
require 'rind'

module Core
  class A < Rind::Html::A
    def initialize(options={})

super(options) @attributes[:rel] = 'nofollow' if is_external?


    def is_external?
    private :is_external?

Pass it to the Document as the base_namespace.

# my_file.cgi
require 'rind'
require 'core'

doc ='index.html', :base_namespace => 'core')
puts doc.render!

The links in index.html will now have the rel attribute automatically added.

<a href="" rel="nofollow">GitHub</a>

The Future?

This is an early release. An alpha of sorts. The interface may change before it's all over. Rind needs to help out modules with style sheets, JavaScript libraries, images, querying system/user info, etc. Virtually no time has been spent optimizing the code. More test cases need to be written. I still have a bunch of stuff in my office that needs filing. You get the idea.

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